The Windows Live Mail team added more customers to the beta by sending out invites through Windows Live Ideas on Monday. Unfortunately the beta is still restricted to English (US, UK, AU) and Japanese (JP) as Reeves writes in the Mail Call blog. It also appears that some MSN Premium SKUs still don't work, as customers have already contacted me and commented. Problems might occur if your MSN Hotmail account is connected through a third-party MSN Premium partner like Verizon or Charter.